I have a 9 x 13 aluminum freezer pan that I layered some stuffed hot peppers in and covered with sauce. It is only one layer. Is it safe to freeze without filling the pan fully?
Note from Michelle Yes, there is no food safety problem with a half full pan.
A full pan is better because there is less air, and thus less chance of freezer burn. You could also freeze in a freezer bag and press out all the air. This article will give you more information about what freezer containers is best to use.